Centrifugal governor



March 11, 1941. A. NICOLE CENTRIFUGAL GOVERNOR Filed April 20, 1939 Fig. 3

Fig.1

Patented Mar. 11, 1941 UNITED STATES PATENT OFFICE,

CENTRIFUGAL GOVERNOR Amde Nicole, Saint-Croix, Switzerland, assign'or to Paillard et Cie S A., Sainte-Croix, Switzerland, a corporation of Switzerland Application April 20, 1939, Serial No. 269,028 In Switzerland April 22, 1938 8 Claims. (01. 264-48) The present invention has for its subject a centhis purpose each centrifugal ball is attached to trifugal governor provided with a transverse a resilient support or spring blade of Which the braking plate sliding on a rotary shaft and of ends are connected respectively to the transverse which: the axial and angular movements are braking plate, and to a collar fixedly secured to controlled by springs secured to the shaft and the rotary shaft, at points located on opposite 5 subjected to the action of balls or other Weights sides of a central plane passing through the rosubjected to centrifugal force. tary shaft and the point of attaching the ball to Governors of this character are in general use the Spri g blade, in such a manner that the force for example for regulating the speed of phonoappl ed o he p e is e e ed essentially y tracgraph motors. In order to enabl governors of tion While eliminating the twisting forces which 10 this type to be used it is necessary for them to are deleterious to the operation of the governor. be very sensitive and in order to respondto this The accompanying drawing shows by way of requirement it is necessary for them to operate example one form of construction of the subject with the minirnurn of friction. This is now the of the invention, wherein:

"ase of governors of the most well known type F 1 5 an elevat o wherein the springs supporting the centrifugal Fig. 2isaplan. ball or weight are formed by simple blades. Fig. 3 shows the deformation of the springs When these governors are applied for the reguunder the action of centrifugal force. at o of the speed of spring motors they are Figs. 4 and 5 are detail views of resilient memplaced in the mechanism ahead of the shaft carbers. v Y? ryjng t plate turntable and operate in a satis- As shown in the figures the shaft H! is provided factory manner as the forces to which they are at its lower end with a worm II and at its upper subjected are relatively low. I end with a pivoting terminal ball l2. To the This however is not the case when they are reshaft Hi there is secured, by means of a screw I3,

quired to effect the regulation of the speed of an a stationary collarmember M of triangular shape 25" electric motor as in such a case they are placed p v ded t a S ve AS W triangular directly in engagement with the driving shaft me be i4 is Substantially perpendicular to and are subjected to considerable forces, up to shaft l0.

ten times as high as in the preceding case. The The transverse braking plate E6 is adapted to action of the centrifugal balls carried on the slide on the shaft l9, and is secured to a slid springs tends to shear them as the speed of rotaable rider member I! of the same triangular tion increases, whereby the normal operation of S pe as e triangular 001 memb 4 nd iS the governor is impeded and whereby fracture P ov ded With a Sleeve e p e bet een of the springs is sometimes produced. As the the ends of the two sleeves l5 and I8 corresponds section of the springs cannot be increased, for the W e maximum al m v ent of the transpurpose of strengthening them, without destroyverse plate 15 relatively to the triangular collar ing the sensitiveness of the governor, it results member 14- that governors of the type described above cannot To each of the three faces of the triangular be used for regulating the speed of electric members 14 and I! are secured the ends of a re- LO-motors. silient member A preferably consisting of two 40 Endeavors have been made to impart to the spring blades l9 and 2!) having p l e s a d governor the necessary rigidity, for example by which cross one another as shown substantially means of hinged links adapted to relieve the midway f he l n th in such a manner as to spring blades, but all means of this character have form a St. Andrews cross, the center of the cross "the serious disadvantage of destroying the sensiserving as the securing p in 24 for a centrifugal 45 tiveness of the governor by reason of the friction ball or weight 2|.

which they set up. The operation of this governor is as follows:

The present invention has for its object to When the shaft [0 is driven, for example in the remedy this disadvantage by creating a governor direction of the arrow 22 (Fig. 2) the centrifugal of construction of the governors of the known prising'the spring blades 59 and 29 under the actype, and the sensitiveness of the springs carrytion of centrifugal force, as is shown in Fig. 3, ing the centrifugal balls or weights, obviates the which produces an axial movement of the transsprings being subjected to the deleterious twistverse braking plate 16 towards the stationary tril6 ing action produced by the centrifugal balls. For angular collar member l4 and braking plate I6 55 which, while retaining the principle of simplicity balls 2! tend to deform the resilient member comfit engages the fixed braking surface which it is adapted to contact.

When a braking action is thus applied to this transverse braking plate IS the springs l9 and 20 are consequently'subjected to a twisting force, which in known constructions prevents the normal operation of the governor by reason of the deformation of the blades, and this twisting force also produces in the course of time a deterioration of these blades. With a governor according to the present invention the saidbraking forces are essentially converted into a pulling forceand a pressure on the springs respectively, which practically eliminate the twisting forces which are deleterious to the effective operation of the governor.

plate is produced without any deleterious force on the springs, by a pulling force on each of the springs which produces a horizontal component which is tangential to a circle concentric with the axis of rotation.

It will be understood that the details of construction may differ from those shown in the drawing and described above.

In. particular more than three centrifugal masses may be provided for each governor.

Instead of using spring blades crossed in'the form of a St. Andrews cross as the support for the centrifugal massesll, only a single spring blade A (Fig. 4) may be provided which is sufficiently wide so as to enable it to be secured at its ends at four points which are located in pairs on opposite sides of the plane passing through the rotary shaft and the point of securing the ball. 1

The St. Andrews cross may also be obtained by being cut in a strip A of sufficient width (Fig. 5).

The principal advantage of the supports for the centrifugal balls in the form of a St. Andrews cross is to increase considerably the sensitivity of-theflywheel for a given thicl ness of material without reducing the moment of inertia of the system.

I claim: 1 l,- The combination comprising'a spindle, a ball mounted at one end of said spindle, a triangular support secured to said spindle, a sleeve on said support, said sleeve embracing said spindle.;a plate slidably mounted on said spindle, a worm on said spindle at the end thereof remote from said ball, a second triangular support secured to said plate, a sleeve on said second support and embracing said spindle, the sleeves on said supports being located on the faces of said supports turned towards one another, a plurality of pairs of spring blades, each pair of spring blades crossingone another and being secured at one end to one face of one triangular support and at the other end to a face of theother triangular support and a plurality of centrifugal masses secured one to the crossing point of each pair of spring blades, said sleeves serving to limit the approaching movement of said plate towards the rst triangular support.

2. In a centrifugal governor, particularly for phonographs, a driving shaft, a fixed collar fixedly carried on said shaft, a slidable riding collar slidably carried on said shaft, a plurality of pairs of spring blades extending between said collars,

the two blades constituting each pair crossing.

each other substantially midway of their length, and the respective ends of each blade being attached to points on said respective collars so positioned that said blade intersects obliquely the plane containing the axis of said shaft which passes through the point of intersection of the blades constituting a pair. I I

3. In a centrifugal governor, particularly for phonographs, a driving shaft, a fixed collar fixedly carried on said shaft, a slidable riding collar slidably carried on said shaft, a plurality of pairs of spring blades extending between said collars, each of said pairs being normally substantially positioned in a plane substantially parallel to the axis of said shaft, and each of said blades being attached to said respective collars at points on'opposite sides of the plane containing the axis of said shaft which is perpendicular to the plane of said blades.

4. In a centrifugal governor, especially for phonographs. a driving shaft, a fixed triangular collar fixedly carried on said shaft, a slidable riding.

, triangular collar slidably carried on said shaft, a-

plurality of pairs of spring blades. extending between said collars, each blade of each pair be-' ing attached to points on corresponding triangular faces of said respective collars which points edly carried on said shaft, a slidable riding collar. slidably carriedon said shaft, a plurality of pairs of spring blades extending between said collars,

the two blades constituting each pair crossing each other substantially midway of their length, .1

and a centrifugal weight for each of said pairs attached to the two blades constituting each pair at their intersection, and the respective ends of each balde being attached to points on said respective collars so positioned that'said blade intersects obliquely the plane containing the axis of said shaft which passes through the point of 'intersection of the blades constituting a pair.

6. In a centrifugal governor, particularly for phonographs, a driving shaft, a fixed collar fixedly carried on said shaft, a slidable riding collar slidably carried on said shaft, a plurality of pairs of spring blades extending between said collars,

the two blades constituting each pair crossing each other intermediate of their length, and the respective ends of each blade being attached to points on said respective collars lying on opposite sides of the plane containing the axis of said shaft which passes through thepoint of intersection of said blades.

'7. In a centrifugal'governor, particularly for phonographs, a driving shaft, a fixed coilar fixedly carried on said shaft, a slidableriding collar slidably carried on'said shaft, and a resilient member formed by a pair of spring blades arranged in the form of a St. Andrews cross exe tending between and having its respective ends secured to said collars respectively.

8. A governor according to claim 7, and a centrifugal weight attached to said resilient member at the crossing pointof said St. Andrews cross,

ME'DEE NICOLE. 

